I do it whilst the video is playing or paused at the place I might find particularly appealing. Usually I skip all the "boring bits" and go straight to the peeing action if it's a long video. I quite like watching sneakypee or projectpee videos as they are short, so in these cases I watch the whole video first and check out the action. If I like the content of a particular one, say in my case a standing pee, or the girl peeing into a urinal, or a particularly lovely and sexy girl in a certain position, I will play it again and pause it at the crucial bit, at say her peehole showing with the ur